/*
Copyright 1996, 1998, 1999, 2000, 2001, 2004, 2007, 2009, 2011 Free Software
Foundation, Inc.

This file is part of the GNU MP Library test suite.

The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.

The GNU MP Library test suite is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
Public License for more details.

You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite.  If not, see http://www.gnu.org/licenses/.  */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"

#ifdef OPERATION_lshift
#define func __gmpn_lshift
#define reffunc refmpn_lshift
#define funcname "mpn_lshift"
#endif

#ifdef OPERATION_rshift
#define func __gmpn_rshift
#define reffunc refmpn_rshift
#define funcname "mpn_rshift"
#endif

#if defined (USG) || defined (__SVR4) || defined (_UNICOS) || defined (__hpux)
#include <time.h>

int
cputime ()
{
  if (CLOCKS_PER_SEC < 100000)
    return clock () * 1000 / CLOCKS_PER_SEC;
  return clock () / (CLOCKS_PER_SEC / 1000);
}
#else
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>

int
cputime ()
{
  struct rusage rus;

  getrusage (0, &rus);
  return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
}
#endif

static void print_posneg (mp_limb_t);
static void mpn_print (mp_ptr, mp_size_t);

#define LXW ((int) (2 * sizeof (mp_limb_t)))
#define M * 1000000

#ifndef CLOCK
#error "Don't know CLOCK of your machine"
#endif

#ifndef OPS
#define OPS (CLOCK/5)
#endif
#ifndef SIZE
#define SIZE 496
#endif
#ifndef TIMES
#define TIMES OPS/(SIZE+1)
#endif

#ifndef CNT
int CNT = 4;
#endif

int
main (int argc, char **argv)
{
  mp_ptr s1, dx, dy;
  mp_limb_t cyx, cyy;
  int i;
  long t0, t;
  unsigned int test;
  int cnt = CNT;
  mp_size_t size;
  unsigned int ntests;

  s1 = malloc (SIZE * sizeof (mp_limb_t));
  dx = malloc ((SIZE + 2) * sizeof (mp_limb_t));
  dy = malloc ((SIZE + 2) * sizeof (mp_limb_t));

  ntests = ~(unsigned) 0;
  if (argc == 2)
    ntests = strtol (argv[1], 0, 0);

  for (test = 1; test <= ntests; test++)
    {
#if TIMES == 1 && ! defined (PRINT)
      if (test % (SIZE > 100000 ? 1 : 100000 / SIZE) == 0)
	{
	  printf ("\r%u", test);
	  fflush (stdout);
	}
#endif

#if TIMES == 1
      cnt = random () % (GMP_NUMB_BITS - 1) + 1;
#endif

#ifdef RANDOM
      size = random () % SIZE + 1;
#else
      size = SIZE;
#endif

      dx[0] = 0x87654321;
      dy[0] = 0x87654321;
      dx[size+1] = 0x12345678;
      dy[size+1] = 0x12345678;

#if TIMES != 1
      mpn_random (s1, size);

      t0 = cputime();
      for (i = 0; i < TIMES; i++)
	func (dx+1, s1, size, cnt);
      t = cputime() - t0;
      printf (funcname ":    %5ldms (%.3f cycles/limb)\n",
	      t, ((double) t * CLOCK) / (TIMES * size * 1000.0));
#endif

#ifndef NOCHECK
      mpn_random (s1, size);

#ifdef PRINT
      printf ("cnt=%-*d ", (int) (2 * sizeof(mp_limb_t)) - 4, cnt);
      mpn_print (s1, size);
#endif

      /* Put garbage in the destination.  */
      for (i = 0; i < size; i++)
	{
	  dx[i+1] = 0xdead;
	  dy[i+1] = 0xbeef;
	}

      cyx = reffunc (dx+1, s1, size, cnt);
      cyy = func (dy+1, s1, size, cnt);

#ifdef PRINT
      mpn_print (&cyx, 1);
      mpn_print (dx+1, size);
      mpn_print (&cyy, 1);
      mpn_print (dy+1, size);
#endif

      if (cyx != cyy || mpn_cmp (dx, dy, size+2) != 0
	  || dx[0] != 0x87654321 || dx[size+1] != 0x12345678)
	{
	  mp_size_t s, e;
	  for (s = 0;; s++)
	    if ((unsigned long long) (dx+1)[s] != (unsigned long long) (dy+1)[s])
	      break;
	  for (e = size - 1;; e--)
	    if ((unsigned long long) (dx+1)[e] != (unsigned long long) (dy+1)[e])
	      break;
#ifndef PRINT
	  printf ("cnt=%-*d\n", (int) (2 * sizeof(mp_limb_t)) - 4, cnt);
	  for (i = s; i <= e; i++)
	    {
	      printf ("%6d: ", i);
	      printf ("%0*llX ", LXW, (unsigned long long) (dx+1)[i]);
	      printf ("%0*llX ", LXW, (unsigned long long) (dy+1)[i]);
	      print_posneg ((dy+1)[i] - (dx+1)[i]);
	      printf ("\n");
	    }
	  printf ("%6s: ", "retval");
	  printf ("%0*llX ", LXW, (unsigned long long) cyx);
	  printf ("%0*llX ", LXW, (unsigned long long) cyy);
	  print_posneg (cyx - cyy);
#endif
	  printf ("\n");
	  if (dy[0] != 0x87654321)
	    printf ("clobbered at low end\n");
	  if (dy[size+1] != 0x12345678)
	    printf ("clobbered at high end\n");
	  printf ("TEST NUMBER %u\n", test);
	  abort();
	}
#endif
    }
  exit (0);
}

static void
print_posneg (mp_limb_t d)
{
  char buf[LXW + 2];
  if (d == 0)
    printf (" %*X", LXW, 0);
  else if (-d < d)
    {
      sprintf (buf, "%llX", (unsigned long long) -d);
      printf ("%*s-%s", LXW - (int) strlen (buf), "", buf);
    }
  else
    {
      sprintf (buf, "%llX", (unsigned long long) d);
      printf ("%*s+%s", LXW - (int) strlen (buf), "", buf);
    }
}

static void
mpn_print (mp_ptr p, mp_size_t size)
{
  mp_size_t i;

  for (i = size - 1; i >= 0; i--)
    {
#ifdef _LONG_LONG_LIMB
      printf ("%0*lX%0*lX", (int) (sizeof(mp_limb_t)),
	      (unsigned long) (p[i] >> (GMP_LIMB_BITS/2)),
	      (int) (sizeof(mp_limb_t)), (unsigned long) (p[i]));
#else
      printf ("%0*lX", (int) (2 * sizeof(mp_limb_t)), p[i]);
#endif
#ifdef SPACE
      if (i != 0)
	printf (" ");
#endif
    }
  puts ("");
}
